The comparative DRRs for acute H- and GI-ARS in canines induced by mixed neutron:gamma, bilateral, total-body irradiation relative to bilateral Co-60 gamma radiation. The dose response relationship (DRR) for H- and GI-ARS in the canine (beagle) derived from total-body, steady-state, bilateral, uniform, mixed neutron:gamma irradiation (5.4:1) with average neutron:gamma energy at 0.85/0.9 MeV (n = 78 total) (MacVittie and Jackson 2020) and a reference dataset of bilateral, uniform, total-body Co-60 gamma radiation (n = 61, male, female beagle) (Norris et al. 1968). The retrospective data sets are presented as probit percent mortality vs TBI as linear normal dose (Gy)